Create Checkout REST API, custom items got removed, help

Retired Boards Appdev Graphql Basics And Troubleshooting
1

I tried contacting partner support, and have not received any response, and this issue affect many merchants using my apps, I am getting desperate here.

I am pretty sure this issue can be replicated in all Shopify stores, the replication steps are as follow :

  1. Send a HTTP POST request to the REST Admin API for Creating Checkout, and in the request, include custom items (variant_id: null, custom: true)

  2. Then in the response returned, copy the “web_url”

  3. Access the “web_url” using web browser, you will notice the custom item is gone.

Shopify Development / API Team, please look into this, this started happening since 2-3 weeks ago